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20121213
20121213
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register of cancer cases. a million barefoot doctors in every village in china recorded every cause of death. and then, the chinese, using relatively unsophisticated computer technology made maps of the distribution of cancer. they knew where concentrations of cancer victims were located, but not why. why was there more stomach cancer in certain parts of the country... more liver cancer in others? that was what dr. henderson was asked to find out. dr. henderson: there was a friend of mine working in taiwan at the time who published an elegant study showing that hepatitis b virus looked like a common explanation in taiwan for liver cancer. so we did studies with them, collected blood from about 10,000 people, tested the blood back here in the united states, and followed them and demonstrated that the same virus was causing liver cancer in china. and from that evolved a series of national vaccination programs. it's just such breakthroughs that have intensified data collection efforts around the world. dr. bernstein: we collect information on the type of tumor and all of the characteri
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